Hi Joe. I needed to replace the battery in my T3 a while back and unfortunately while $50 does sound a little rude, it's probably worth it just for the sake of piece of mind. I've seen the inner guts to the T3 and I'd rather have someone trained to work on the units replace the batteries. At least then if something goes wrong you can go back to them to make it right. Are you able to load from disc any previous programs, if so you might want to load one up before taking the unit in for replacement. Good Luck